[vsnet-alert 11478] VX For: superhump period

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Thu Sep 17 10:32:46 JST 2009


VX For: superhump period

   We have received further observations from Berto Monard and Peter Nelson.
The combined data yielded a mean superhump period of 0.06242(5) d.
A preliminary O-C analysis suggests that a sudden decrease in the superhump
period likely occurred during this interval (likely stage A-B transition).
The mean period after Sep. 15.8 has been 0.0620(2) d.
The light curve is slightly structured, suggesting the presence of
quasi-periodic oscillations similar to super-QPOs.
Such a large outburst amplitude is relatively rare for this superhump period.
Further observations are strongly encouraged.


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